English to Spanish Tech/Engineering Engineering (general)

Contexto:

Attach a plumb line clamp to the rail at the upper bracket and hang a plumb bob down to the next bracket. Plumb the rail “postwise” by measuring from the face of the rail to the plumb line.

Sugiero que postwise es una forma de alineamiento utilizando una plomada pero no encuentro el término correcto,

thanks in advance!